Shaft arrangement for weaving looms



Aug. 5, 1958 c, WAGNER 2,845,953

SHAFT ARRANGEMENT FOR WEAVING LOOMS Filed Jan. 6, 1954 IN VENTOR CURTWAGNER Mu /um ATTORNE S United States Patent SHAFT ARRANGEMENT FORWEAVING LOOMS Curt Wagner, Reutlingen-Betzingen, Germany, assignor toGertrud Wagner, Reutlingen-Betzmgen, Germany Application January 6,1954, Serial No. 408,974

1 Claim. (Cl. 139--92) This invention relates to a shaft arrangement forweaving looms of the type comprising profiled shaft staves of lightmetal.

The use of light metal for shafts of healds has become common practicein an ever increasing extent. The shaft stave either consists of lightmetal throughout or of wood which is provided with a light metal staveon which the shaft hooks are slidably mounted. In both cases, thedroppers gradually work into the light metal, since even with the slightreciprocal or rocking motions of the shaft hooks and the relatively lowfriction caused thereby, very fine metal chips are abraded from theshaft staves. Said metal chips fall onto the warp thread, thus enteringinto the fabric and causing stains in the finishing process which stainscannot be removed.

It is an object of the present invention to provide shaft hooks which donot cause any wear and tear of the light metal shafts.

With this and further objects in view, according to the presentinvention the shaft hooks consist of resilient clips which arecontracted in the midway of their length and provided at their free endswith slide strips or more particularly rollers adapted to be put on theshaft which is constructed as a slide rail, by spreading the resilientarms, preferably by means of a forcipated tool, said slide strips orrollers consisting, or being provided with a coating consisting of, anon-metallic material which is plastic, elastic, safe against abrasionand also does not cause any abrasion on the shaft stave. Preferably,vulcanized fiber, glass, polyamides, superpolyamides, superpolyurethanesor similar artificial resin substances are used for this purpose.

My novel shaft hook clip accordingly is constructed in such a way that aU-shaped stirrup is formed in the middle with a contracted portion, insuch a way that the lower eyelet formed in this manner serves forreceiving the heddle rods 5 for the healds, while the free ends of thelegs carry the strips or more particularly rollers sliding or rolling onthe slide rail profile of the shaft stave. Owing to the resiliency ofthe the U-shaped stirrup it is very simple to line up the shaft hooks onthe shafts since the legs of the U merely have to be spread apart andplaced on the slide rail in this condi tion, whereupon the tool causingthe spreading is removed. The interchange of shaft hooks, therefore, isvery simple.

Preferably, in place of slide strips, rollers are provided which consistof synthetic resin product having a kind of lardaceous or amyloidnature, such as polyamide. These substances in spite of their extremelyhigh abrading strength have the property of not causing any abrasion onthe slide rails since a kind of lubricating effect is produced.

It is not necessary for the slide strips or rollers to consist entirelyof the respective non-metallic material,

.but it is suflicient to provide these parts of the shaft hooks with acoating of the said material which coating may be produced by a dippingor pressing process.

Other and further objects, features and advantages of the invention willbe pointed out hereinafter and appear in the appended claim forming partof the application.

In the accompanying drawings several now preferred embodiments of theinvention are shown by way of illustration and not by way of limitation.

Fig. l is a section through a wooden shaft for healds with a slide railsunk therein and a rigid shaft book of the roller type mounted thereon,

Fig. 2 is a section similar to Fig. l, but with an elastic clip-hook ofthe roller type,

Fig. 3 is a similar section with an elastic clip book of the slidingtype,

Fig. 4 is a perspective view of a shaft hook as per Fig. 3, mounted on aslide rail, I

Fig. 5 is a side view of a modification as per Fig. 2,

Fig. 6 is a section through a shaft hook roller adapted for themodification shown in Figs. 1, 2, and 5, and

Fig. 7 is a section through a slide rail as per Figs. 3 and 4.

Similar reference numerals denote similar parts in the different views.

Referring now to the drawings in greater detail, and first to Figs. 1 to3 and 5, it will be seen that in this case, the profiled carrier rail 2of light metal for the shaft hook is sunk in the shaft stave 1 which mayconsist, for instance, of wood.. In the embodiment shown in Fig. 1 theshaft hook consists in known manner of a rigid U-member 3 Whose upperpart is formed with a pair of cranked arms 3' and 3" for the support ofa pair of rollers 4. The lower part of the shaft hook 3 forms a hook 3"for supporting the heddle rods 5 on which the healds (not shown) arelined up. Such a shaft hook 3 must be lined up on the slide rail 2 fromthe end of the shaft.

It is preferred to make the shaft hook 3 of an elastic material in theform of a closed stirrup, Fig. 2, having in the middle contractedportions 6 and 6, permitting the heddle rods 5 to be inserted in thelug-shaped pocket 3a of the stirrup. It will be understood that the twolegs 3' and 3" can easily be spread by means of a forcipate tool forslipping the rollers 4 over the profiled bar 2 as the tool is released.

The embodiment shown in Fig. 3 differs from that of Fig. 2 only by thefact that in place of rollers 4 slide strips 7 are fixedly or rotatablymounted on the legs 3' and 3" of the stirrup. This construction of theshaft hook is clearly seen in Fig. 4.

The side view as per Fig. 5, corresponding to the cross section as perFig. 2, shows the cooperation of the rollers 4 of the shaft hooks 3 onthe slide rail 2' of the profiled slide rail member 2.

The rollers 4 and the slide rails 7 consist of a nonmetallic material ofa plastic and elastic character, preferably of polyamides. Figs. 6 and 7are cross sectional views of two embodiments of rollers 4 or slidestrips 7, respectively, consisting of any suitable material, such as,metal or wood, and provided with a coating 8, or 8' of a non-metallic,plastic and elastic material of the kind referred to.

While the invention has been described in detail with respect to certainnow preferred examples and embodiments of the invention it will beunderstood by those skilled in the art after understanding the inventionthat various changes and modifications may be made without departingfrom the spirit and scope of the invention and it is intended,therefore, to cover all such changes and modifications in the appendedclaim.

I claim:

In a shaft arrangement for weaving looms, a shaft stave member; aprofiled metal carrier rail secured to said shaft stave member, saidcarrier rail having a web formed with a central vertical portion and apair of metal sliding surface portions, each extending laterally fromeither side of said vertical portion, said metal sliding surfaces beingspaced from said shaft stave member; a plurality of shaft hooks adaptedfor slidable movement along said carrier rail, each of said hookscomprising a U-shaped member having end portions formed with inwardlyextending arms, a pair of rollers of plastic material, each of saidrollers being rotatably mounted on each of said arms respectively, andengaging with its peripheral surface in sliding contact with one of saidpair of metal sliding surface portions of said carrier railrespectively, whereby a sliding movement may be imparted to said shafthooks along said rail.

UNITED STATES PATENTS Carr June 1, Consoletti Apr. 14, Consoletti June2,

FOREIGN PATENTS

